I am making a showcase and have come across a strange union bug I can’t seem to fix.
I have even changed the CollisionFidelity to PreciseConvexDecomposition which usually fixes this for me. But i still have the problem of floating around the union.
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Turn on the “Show Decomposition Geometry” option in studio and you’ll be able to see exactly what the generated collision geometry looks like: 
If that’s one big union it’s probably too complex a concave shape for the decomposer to figure out what to do with it, and you’ll need to break it up in to few pieces.
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